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Mathematics 21 Online
OpenStudy (anonymous):

when solving the system x+2y=9 and x-y=6, which expression could be substituted for x in the second equation? a.9=x b.y-9/2 c.9-2y d. 1/2y+9

OpenStudy (y2o2):

c.9-2y

OpenStudy (anonymous):

wouldnt it be b?

OpenStudy (y2o2):

You want to substitute for x not y

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